| Title | Repository | |
|---|---|---|
| O'Brien, Madeline E. Landzert, Papers (#CD01-45) | Country Doctor Museum | |
| O'Brien, Timothy J., Oral History Interview (#OH0024-060) | Manuscript Collection | |
| O'Connell, James T., Papers (#0166) | Manuscript Collection | |
| O'Connor, Flannery, Papers (#1169-029) | Manuscript Collection | |
| O'Hagan, Charles J., Papers (#1274) | Manuscript Collection | |
| O'Neal Foundation Papers (#0020) | Manuscript Collection | |
| O'Neal, Martha, Scrapbooks, (UA70-33) (#UA70-33) | University Archives Collection | |
| Oakmont Baptist Church Records (#MF0042) | Manuscript Collection | |
| Oden, III, John Henry, Collection (#1150) | Manuscript Collection | |
| Okuski, Henry, Oral History Interview (#OH0024-051) | Manuscript Collection | |
| Old - Bagley Collection (#1101) | Manuscript Collection | |
| Old Sparta Primitive Baptist Church Records (#1219) | Manuscript Collection | |
| Olive, Hubert E., Scrapbooks (#MF0019) | Manuscript Collection | |
| Onachila, Thomas, Jr., Papers (#0677-006) | Manuscript Collection | |
| Opportunity, (UA50-37) (#UA50-37) | University Archives Collection | |
| Oral History Collection (#LL02-03) | Laupus Library | |
| Oral History Collection, (UA95) (#UA95) | University Archives Collection | |
| Oral History Project, Rise of Alpha Dog, (UA95-18) (#UA95-18) | University Archives Collection | |
| Ordess, Mary Louise Brantley, Papers (#CD01-46) | Country Doctor Museum | |
| Orientation Programs, (UA50-36) (#UA50-36) | University Archives Collection | |
| Ormond Family Papers (#1180) | Manuscript Collection | |
| Ormond, Rosa, Collection (#0920) | Manuscript Collection | |
| Orr, Louis, Collection (#1055) | Manuscript Collection | |
| Orr, Mabel C., Papers, (UA70-30) (#UA70-30) | University Archives Collection | |
| Orr, William M. III, Papers (#0156) | Manuscript Collection | |
| Osborn, William H., Papers (#0041) | Manuscript Collection | |
| Ott - Lundin Family Collection (#1051) | Manuscript Collection | |
| Outdoor Theatre, Institute of, Archives (#1250) | Manuscript Collection | |
| Outland and Copeland Family Papers (#1254) | Manuscript Collection | |
| Outlaw, Doris Croom, Collection (#0756) | Manuscript Collection | |
| Outlaw, Eva Belle, Papers, (UA70-21) (#UA70-21) | University Archives Collection | |
| Owen, Richard H., Collection (#1327) | Manuscript Collection | |
| Owen, William D., Oral History Interview (#OH0103) | Manuscript Collection |